QTL Analysis of Plant Height Under Different Nitrogen Application Conditions in Rice
In order to identify the quantitative trait locus(QTL)of rice plant height traits and explore the genetic mechanism of plant height,the sequenced recombinant inbred line(RIL)population of Liangyou Peijiu was used to investigate the plant height traits of RIL population and its parents,including plant height,first internode length,second internode length,third internode length,fourth internode length,fifth internode length,sixth internode length,culm length and panicle length,under different nitrogen application conditions.QTL analysis of rice plant height traits was performed by using the inclusive composite interval mapping(ICIM)of QTL IciMapping v4.2.The results showed that there were 12 major QTLs:qE1IL4-8,qE1IL5-1,qE1IL6-1,qE1IL6-2,qE1IL6-3,qE1PH-8,qE1PL-5,qE1CL-8,QE1IL1-4,qE2PH-9,qE2PL-2,qE2CL-9.Among them,under the condition of no nitrogen application(E1),qE1IL4-8,qE1PH-8 and qE1CL-8 on chromosome 8 were detected in the same interval,indicating that the interval had a pleiotropic effect.The additive effects of qE1IL4-8,qE1PH-8 and qE1CL-8 under E1 treatment was 0.87,4.33 and 3.82,respectively,indicating that this interval could simultaneously increase the internode length,plant height and culm length of rice without nitrogen application.By searching the gene functional annotation of the candidate interval qE1IL4-8/qE1PH-8/qE1CL-8,it was found that there may be genes related to plant height in this interval.Therefore,qE1IL4-8/qE1PH-8/qE1CL-8 has great application potential in nitrogen efficient breeding.
万方数据
维普
